题干
---- I drove to Zhuhai for the air show last week.
---- Is that the reason _______ you had a few days off?
---- Is that the reason _______ you had a few days off?
A：why
B：that
C：what
D：which
答案(点此获取答案解析）
A
里填上“＞”“=”“或＜”。
2CO △H > 0 反应速率为 u1，N2＋3H2